Machine for forming an abrading



P" 20, 1954 c. o. MERCHANT 2,675,719

MACHINE FOR FORMING AN ABRADING SURFACE on THE PERIPHERAL SURFACE OF A WHEEL Filed April 27, 1948 8 Sheets-Sheet l INVENTOR. (beg/er 0. 77k rc r 7" BY \ZZWM/ April 20, 1954 c Q MERHANT v 2,675,719 MACHINE FOR FORMING AN ABRADING SURFACE ON THE PERIPHERAL SURFACE OF A WHEEL Filed April 27, 1948 8 Sheets-Sheet 2 BY a /JLMLW x v/ 4 p 1954 c. o. MERCHANT 2,675,719

MACHINE FOR FORMING AN ABRADING SURFACE ON THE PERIPHERAL SURFACE OF A WHEEL Filed April 27, 1948 8 Sheets-Sheet 5 Fla/0b Aprll 20, 1954 c. o. MERCHANT 2,675,719

MACHINE FOR FORMING AN ABRADING SURFACE ON THE PERIPHERAL SURFACE OF A WHEEL Filed April 27, 1948 8 Sheets-Sheet 6 C. O. MERCHANT MACHINE FOR FORMING AN ABRADING SURFACE April 20, 1954 ON THE PERIPHERAL SURFACE OF A WHEEL 8 Sheets-Sheet 7 Filed April 27, 1948 INVENTOR. C/ es 2 2? amemknr BY April 20, 1954 c. o. MERCHANT ,7

MACHINE FOR FORMING AN ABRADING SURFACE ON THE PERIPHERAL SURFACE OF A WHEEL Filed April 27, 1948 8 Sheets-Sheet 8 IN V EN TOR.

Patented Apr. 20, 1954 MACHINE FOR FORMING AN ABRADING SURFACE ON THE PERIPHERAL SUR- FACE OF A WHEEL Chester 0. Merchant, Erie, Pa., assignor, by mesne assignments, to George G. Blaisdell, doing business as Zira Laboratories, Bradford, Pa.

Application April 27, 1948, Serial N 0. 23,425

Claims.

This invention relates generally to machines *for grooving the peripheral surfaces of metal wheels and more particularly to machines for forming an abrading surface on the periphery of a metal wheel or disc.

Many attempts have been made heretofore to provide an abrading surface on the periphery of metal discs or wheels by production processes but none of these devices have provided a'satisfactory abrading surface on the periphery of the Wheel nor have any continuous production lines methods heretofore been provided to automatically form an abrading surface on the periphery of a wheel at a high production rate and without any manual intervention. Different types of turning lathes, screw machines, and other machine tools have been utilized to form an abrading surface on metal wheels or discs but in the process of chucking, grooving, cutting off, etc. production is extremely slow with the result that the manufacture of these wheels has been the most costly operation in making an item such as a cigarette lighter. Furthermore, it has been practically impossible to control the depth of the grooves with any degree of accuracy thereby providing an inefiicient abrading surface in most instances. None of these prior devices have provideda means of forming an abrading surfaceon the periphery of a metal disc wherein the depth of the individual cross grooves may be varied and the depths thereof predetermined.

It is, accordingly, an object of my invention to provide a method and machine for forming an. abrading surface on the periphery of a metal disc or wheel, which overcomes the above and other defects in present methods and machines for forming such a surface on the wheel and it is more particularly an object of my invention to provide a machine for forming an abrading surface on the periphery of metal discs or wheels which ;is efiicient in operation, economical in manufacture, high in production'and automatic in operation.

Another object of my invention is to provide a machine for forming an abrading surface on the periphery of metal discs wherein the depth of the cuts of the abrading surface may be varied and predetermined.

Another object of my invention is to provide a machine for forming an abrading surface on the periphery of metal discs wherein the discs are moved, continuously along a track and one or -more grooving operations are performed on the pheriphery of the discs as they pass one or more stations in the machine.

Another object of my invention is to provide a machine for forming an abrading surface on the periphery of metal discs wherein metal cutting or grooving members are reciprocated intermittently while the metal discs are rotated apredetermined time.

Another object of my invention is to provide a novel machine for forming an abrading surface on the periphery of metal discs wherein novel cam operated mechanism are provided along with mechanism for intermittently operating the rotating and cutting devices.

Another object of my invention is to provide a novel machine for forming an abrading surface on the periphery of metal discs wherein novel means are provided for feeding the metal discs along a track continuously into predetermined'positions to be rotated and grooved.

Another object of my invention is to provide a novel method offorming-an abrading surface on the periphery of a metal-disc.

Other objects of my invention will become evident from the following detailed description, taken in conjunction with the accompanying drawings, in which: i Y

Fig. 1 is a vertical sectional view of my novel machine for forming an abrading surface on the periphery of a metal wheel;

Fig. 2 is an end elevational view with parts broken away, of my novel machine;

Fig. 3 is a transversevertical sectional view of my machine;

Fig. 4 is-a plan view withparts thereof in section of my novel machine; I

' Fig. 5 is a more or less diagrammatic view of cutter members at the first station of my novel machine;

Fig. 6 is a side elevational View of the metal wheel which has been grooved by the cutter members shown in Fig. 5; a

Fig. 7 is a more or less diagrammatic view of the cutter members at the'second station in my machine;

Fig. 8 is a side elevational view of a meta wheel which has been progressively grooved by the cutters shown in Figs. 5 and 7;

Fig. 8a is a more or less diagrammatic view of my novel cutter members off-set from each other;

Fig. 9'is-atransverse vertical sectional view taken on the line 99 of Fig. 10;

Fig. 10 is a plan view of the gear housing in Fig. 9 with the cover removed;

Fig. 10a is a bottom view of the wheel engaging members showing the cleats thereon;

Fig. 10b is a bottom view of the wheel engaging members showing shortened cleats thereon;

Fig. 11 is a fragmentary transverse vertical sectional view taken through the parts of my machine for rotating the metal disc and for moving it upwardly to an operative position;

Fig. 12.-isv a fragmentary plan view showing the escapement mechanism for rotating the feeding device of the metal discs in my novel machine;

Fig. 13 is an enlarged fragmentary side elevational view with the parts broken. away ofv the adjustable chuck of my novel machine for holding the cutter members;

Fig. 14 is a fragmentary side elevational view showing the mechanism for rotating the feeding device to move the metal wheels along the track in my novel machine into operative position;

Fig. 15 is an enlarged fragmentary side elevational view showing the auxiliary feeding-device for feeding the metal wheels along the track to the second station in'myr nove1' maehme;

Fig. 16 is .a more'or less diagrannnaticview of the intermittent gears foriintermittently operating the cutter members'ofsmy novel machine; and

Fig. 1'? is a fragmentary" View showing. the dwell member and the pins on the cam member in engagement. Y

For illustrative purposes, I have shown a machine for forming an abrading'surface on the periphery of a'metal: wheel for use in 'frictionally engaging the flint in a cigarette or cigar lighter. Many variations of my device may be made for providing any type of a groovedsurface'on the periphery of a metal wheel or disc.

- Referring now to the drawings, I show in Fig. l a base I having mountedthereon a motor 2 with a shaft 3 and a pulley 4, anda gear housing 5 having offset, oppositely outwardly extending shafts 6' and 1, the shaft 6 having a pulley 8 which is driven by a belt orchain 9 trained'over the pulleys 4 and 8'. The shaft Tis connected to a longitudinally extending shaft I by a suitable coupling II. The shaft I0 is journalled in bearings I 2 and I3 in the side frame members I 4-and I and bearing I6 in the side frame member IT. The shaft II] has cams I8, I9 and 20' fixedly mounted thereon and spaced from each other for purposes which will be hereinafter described.

The shaft I0 has a driving gear 22 fixedly mounted thereon in engagement with a driven gear 23 fixedly mounted on a counter shaft 24 journalled in bearings 25 and 25 in the side frame members I4 and I5. The shaft 24- extends through apertures 21 in a gear casing 28 which is mounted on the base I. fixed to the shaft'24 and mounted thereon centrally of the casing 28 by set screw 30. InEig. 3, I particularly show the spiral gear 29 in engagement with spiral gear 32 disposed at righti'angles thereto and mounted on a vertically extending shaft 33; the reduced bottom portion thereof being journalled in a thrust bearing 35'. The spiral gear 32 and. bearing 35 are securedon the end of the shaft 33' by a washer 35a and a threaded member 351). Screw caps 36 and 31' in the housing 28 provide for admission of a lubricant thereto. The upper reduced portion 38 of the shaft 33 is journalled in the bearing 30 in gear housing 49 and a spur gear 42 is mounted on the upper end of the shaft 33 and secured thereto by threaded member 43. The spur gear 42 meshes with gear 44 (Figs. Q'and which in turn meshes with oppositely disposed gears 45 and 46. The gears 45 and have hubporti'ons 41 and 48 which seat'on thrust'bearings 49' and A spiral'gear 29 is 4 50. The bearings 49 and 50 seat on shoulders 5| and are held in place by annular rings 52 and 53 secured by screw bolts 54 and 55. The gears 45 and 49 are mounted on the reduced portions as and 62 of the shafts 56 and 51, the ends 63 and 64 thereof being threaded for receiving washer and nut assemblies 65 and 66. The lower ends of the shafts 53 and 51 have inverted frusto-conical shaped heads 6'! and 69 with axially extending threaded counterbored recesses 'II for threadahly engaging gripping members 69 and ID for engaging'wheels-movable along a track 15 to rotate them in unison with the rotation of the shafts SSH-and 51.. The gripping members 59 and 19 have spuds or cleats I3 to frictionally engage a wheel 18; The lower ends of the shafts 56 and 57;.are supported. by bearings 58 and 59 which in turn are supported by flanged disc members BI mounted on shoulders 12 formed on the shafts 56 and 51. Fig. 101) shows shortened cleats 13a.

open/track- T5r' runs longitudinally of my novel machine'in aligninentwith the" rotatable heads 61'! "and 68 onthe shafts 59 and; 51. The

track 15 is: preferably directed angularly upwardly at (6 wherein it is in a position to receive selected. metal wheels or discs from" a conventional hopper type selector which disposes the discs into" the track 15 singly 'and' successively in a flat position.

To' raise the wheels or'discs 18 from the track 15' to engage the gripping'members 69 and I0, I have provided two reciprocating members 89, one of which is shown particularly in Fig. 11. Themembers are reciprocated'by the cams I 9 and 20 on the shaft I9. The members 89 are alike and each comprises a cylindrical member 81 with an internally reduced portion 82 and a reduced outer-portion 8'3'.threaded at 84 to receive the internally threaded portion 85 of. a threaded abutting member 86. Cup shaped cap members 9| are mounted'on the lower end of the member 81' and it has mounted thereon cam rollers 8! for engagement with the cams l9 and29 on the shaft ID. The caps! are secured by ball member 9111 engaging a slot 9lb' in the member 8|.

A cylindrical member 88 with a reduced portion 89 is disposed in the reduced portion 82 of' the cylindrical member 81 and it nests a coil spring 90. A cylindrically shaped member 92 has a reduced'portion 93-which extends into the opposite end of the coil spring and is resiliently supported thereby and engageable with a shoulder 9Ic in the member 8!. A cap member 94 is 'secured' on the upper end of the cylindrical member 8| by screw bolts 95, the cap member 94 having an upwardly extending marginal flange 96for receiving the grooved portion 9! of the flanged head'98'of' a depending shaft 99. A bearing member I00is mounted on the lower end of the shaft 99 and secured thereto by a nut I92'in engagementwith the reduced threaded end [03 0f the shaft 99. The'shaft 99 has an upwardly extending flange I04 for receiving the bored portion I05 of head I05. Thehead I95 is substantiallyfrusto-conical in shape and has an outwardly extending nose I01. The head I96 is secured to the flanged portion 98 of the shaft 99 by screw bolts I08. The'head Ids has an aperture I09 extending therethrough to receive a guiding pin III). The guiding pin Illl has an enlarged headedportion II2 on the lower end thereof which is guided in an axially extending cylindrical bore I I3 in the upper end of the shaft 99 and it is engaged by a spring I I4which urges the pin H0 upwardly to 'aposition as shown in Fig. 11. As will be noted in Fig; 11, the engaging member I 06 moves upwardly upon each rotation of the cams I9 and 20 and engages a wheel 18 in the track and forces it into engagement with a gripping member 69 or 10 thereby causing rotation of the wheel 18 for a predetermined period of time or the time that the high points on the cams I9 and are in engagement with the cam rollers 81 of the members 80.

I will now explain the operation of the cutters and the mechanism for intermittent operation thereof. Figs. 1, 2 and 4 to 8 inclusive show the cutters and operating mechanism therefor. The cutters I90 and I9I are operated from gear 192 fixedly mounted on the shaft I0. An arcuate shaped dwell member 193 as shown particularly -in Figs. 2 and 16 is secured to the gear 192 by machine bolts 194. The dwell member 193 is adapted to engage laterally extending pins 185 on a cam member I I5 mounted on the shaft II6 adjacent the gear II1 which meshes intermittently with the teeth of gear 192. As shown in Fig. 16, the period of dwell approximates 144 degrees of movement of the gear 192 or two-fifths of a revolution in which the teeth of gear 192 are not in mesh with the teeth of gear II1. In order to reduce the impact of the leading gear teeth at the beginning of each intermittent motion, due to the inertia of the driven gear I I1 and the offset position at which tooth contact takes place, adjustable, rectangular shaped impact reducing members II8 having elongated slots H9 and laterally extending engaging portions I20 are secured to the face of gear 192 by screw members I2I at each end of the dwell member 193. The projecting portions I20 of the members I I8 move in the arcuate shaped, inwardly grooved portions I22 of the cam member II5 on the shaft II6. It will thus be evident that there will be no rotation of the shaft I I6 for two-fifths of a revolutions of the gear 192 during the time that the pins 195 on cam member II5 engage the dwell member 193 on the gear 192.

The pins 195 ride the dwell member 193 as shown'in Fig. 17. The ends 196 of the dwell member 193 are curved to correspond to the gyration of the pins 195 as motion is imparted to the gear H1. The shaft H6 is journalled in bearings I23 and I24 in side frames I5 and I1 and it has a bevelled gear I25 mounted on the outer end thereof. The bevelled gear I25 engages oppositely disposed, similar bevelled gears I26 which are mounted on shafts I21 which extend angularly outwardly from the shaft 6 at right angles thereto as shown in Fig. 2. The shafts I21 are disposed in casings I28 and they are journalled in bearings I29. The upper ends of the shafts I21 also have bevel gears I39 mounted thereon for engagement with bevelled gears I32 mounted on spaced, parallel, horizontally extending shafts I33. The shafts 133 are jour'nalle'd in bearings I34 and they ha've mounted thereon cam members I35 with successive, arcuate shaped, connected cam surfaces I36 formed on the periphery thereof. Cam rollers I31 engage the cam members I 35 and are mounted in yokes I38 forming a part of shafts I39 supported in frames I40 which are secured to table MI by bolts I42. The bolts I42 extend through transverse, elongated'slots I44 to permit sidewise adjustment of the frames M0. 7 The frames I40 are generally U-shaped and a spring I43 is disposed between the flanged portions I 31 of the shafts I39 and one leg of the frames'I40.

-I52a are secured by screw bolts I54a.

the chucks I50.

Attached to each "of the shafts I33 is a cutter chuck I50 for securing cutter member I90 or I9I. A chuck I50 is shown particularly in Fig. 13. Each chuck I50 is split at I BI and the lower arcuate halves I52 thereof are secured to the upper halves I53 by machine bolts I54. The cutter members I99 and I9I are movable longitudinally by the rotation of the internally threaded cylindrical member I55 which has spaced recesses I56 for receiving a handle for rotation thereof. The -member I55 threadably engages a threaded member 250 held against rotation by the off-set end 25I thereof engaging the member 252 disposed in a recessed portion 253 in the aperture 254' in the shaft I39 The cutter members I90 and I9I are received and held by the threaded members 250. The halves The cutters I 90 and I9I are secured by the locking screws I54 against longitudinal movement. The member I55 has spaced transverse grooves on the periphery thereof for receiving a spring-urged finger I 51 to lock'it against rotation. The finger I51 is pivoted at I58 and a spring I59 urges the engaging portion I60 into engagement with the grooved periphery of the member I 55. It will'be evident upon inspection that the high points of the cams I9 and 20 will be in engagement with the cam rollers 81'to cause the members 18 to engage the gripping members 69 and 10 when the teeth of gear 192 engage the teeth of gear II1 during three-fifths of a revolution thereof thereby causing rotation of the cam members I35 and reciprocation of the cutters I90 and I! in The cutters I90 and I! are reciprocated during the time that the wheels 18 rotate one-half revolution. H

In Figs. 1, 12, 14 and 15, I show the means for feeding the wheels 18 along the track 15 in a predetermined sequence. Cam I8 on shaft I0 engages the cam roller I60 on arm I6I of ball crank I62 pivoted on shaft I63 and secured thereon by a nut I64 engaging a reduced threaded portion of the shaft I63. A torsion spring I65 ber' IIllis' pivotally secured to support member I 1I by machine'bolt I12. Spring member I13 engages an arm I14 and an extension I15 of the ratchet member I10 to urge it into engagement with the ratchet teeth I68 of the ratchet wheel 169. A spring I16 is'engaged to an arm I11 and an extension I18 of the ratchet member I66 to "urge the ratchet I66 into engagement with the ratchet 'teeth I68 of the ratchet wheel I69. An

anchored spring I19 engages the arm I11 to urge the ratchet wheel I60 forwardly. The ratchet wheel i 69 is"secured t'o vertically extending shaft "I by locking screws 'I8I and a feeding wheel I82 is mounted on the upper end of the shaft I80. The feeding wheel I32 has adjacent, arcuate "shaped, grooves I83 formed on the periphery thereof substantially the size of the wheels I8 to be fed along the track 15. The edge of the'wheel I62 extends over the track 15 so as to selectively engage and move forward wheels 18 moving along the track 15; The shaft I80 has an enlarged head portion I6 which rests on the upper portion I85 of the cylindrical casing member I86. The cylindrical' member I88 has an outwardly flanged,

apertured iportion I81 whichds; connectedcitarzthe frame I88zby welding or any other suitable means.

. A bracket ZiI-Iis connected to: the-tarm- I61? by screw bolts 92; and ayertically extending bracket I93 having a turn: buckle [94,. is, connected to the bracket 29I by a bolt and nut assembly I95 and to the bell crank I98 by' aboltiandnut assembly I91. The bell crank I9.6: has..a.n elongatedslot I98 to permit adjustment of the, upper endof the rod I93. The bell crankzlilfi is pivoted at I99 -and an adjustable rod Ziitis connected to the upper end of the bell crank I96 at'20-I. The-outer'end of'the rod 290.. shownparticularly in-Fig. L5, is connected to a depending bracket 202'by-' a pin 203, the bracket 202 being tin-turn connected to a freely pivotable member "204 by 13in 205-. The pivotable member 29 1 has a depending nosep'ortion 205 which'is' spaced verticallyand longitudinally from the lower end- 2-01 of 'an' L-shaped member 299 and secured to member 204 at 209. The depending portion 205 of-the 'pivotable member 204 has a tapered portion 210 which=permits the pivotable member 2% to :moveupwardlyrand backwardly over the wheels I8rin the track. I5. Themember 29'9moves rearwardly' together with the pivotable member 234 and it drops into the track I5 and engages and moves a wheel 13 upon the forward movement of'therod 2-00'when there is no wheel upon which it can ride. Thus, even though there is no-wheel following, awheel is moved forwardly to the second station of my machine.

A plate 220 (Fig. 1). is-secured in grooved portions 22I in the membersBll, and it has a central aperture222 in which asleeve 224 is secured. A spring 223- is disposed in thesleeve 224=and it rests on a threaded plug 228'. A cap 225 is dis.- posed on the upper end of the spring 223, the cap 225being in engagement with a recess 226 in the frame 222. The spring 223 urges the engaging members 36. away from the gripping members '69 and I0.

In operation, upon the starting of the motor 2 and the rotation of the shaft ID; the rotatable gripping members 99 and will be continuously operated through gears 23 and 29 onshaft 24, gears 32 and 42 on shaft 33, gear 44, and gears 45 and 46 in engagement with gear 44 and mounted on shafts 56 and 51. The gripping members 69 and'li! rotate with the shafts 56 and 51. The gripping members 69 and'10' are disposed a predetermined distanceabove the track .15 which extends therebeneath and in alignment therewith. The wheel engaging, freely rotatable vertically movable heads I06, oneof which is shown in Fig. 11, are moved upwardlythrough the open portion of the track to engage wheels 1'8 at two stations along the track 15- immediately beneath the gripping members 69 and I0 thereby forcing the wheels I8 against the rotating gripping members E9'and 10 whereby the wheels 18 are rotated therewith. The movable heads I09 move upwardly intermittently upon rotation of the shaft In and the cams I9 and 20, the movable heads I95 being moved upwardly to cause rotation of the wheel I3 during a period of approximately a three-fifths revolution of the cams I9 and 20 and shaft III. The intermittent gear mechanism comprises gear 192 on shaft I0, gear III, cam H5 on shaft IIG, dwell sector I93 for engaging the pins 195 on cam H5 and shock members H8 on each end of the sector I93 on gear I I2 to permit a minimum impact of the teeth upon engagement of the curved cam. portion I22.

of-the cam H5 engaging the'projecting portions 8 t2 Inorthe: shock members II B; slicjwmparticularly in'Figs; 16v and 17. Itrwill; thus be evident-that the'pins- 195 on the cam H5 will move overihe sector I92 and thereby no rotational force willbe transmitted between the shaft I0 and" the "shaft I It during the time that the sector I93 and the pins 195 on the cam H5 are inengagementwhich is aperiod of. approximately two-fifths of a'revolution of the shaft I10 and corresponding to the time" that'the Wheelvengaging members 'IIlii "are moved away from the track 18. The intermittent rotation. of theshaft' I It causes intermittent rotation of the bevel gear I25 which insturn'rengagesand rotates gears I26, shafts I21 and ears I30. Gears I in'turnengage bevel gear I32 mounted on shafts I33, each ofwhich has cams'l3'5 mounted thereon. Thus, whenpthe wheelenga-ging members I05 are moved'upwardly to-cause rotation of the wheels!!! at the two stationsio-fthe machine, the cams I35 are rotated-thereby causing rapid reciprocating movement of the" cutters I9IZI and I9I at the two stations of my machine. The cutting portions of the cutters I90 and-I91 at the'two stations are disposedin different angular relationships thereby permittingthe cutting of cross grooveswith any desired relative angular relationship. The depth of the grooves isadjusted by means of the adjusting wheels I59 in the chucks I51.

The operation of the feeding mechanism is as follows:

The cam I8 on the shaft I0 causes movement of the bell crank I62 which in turn causes the ratchet I65 to move the ratchet wheel I69and shaft I clockwise throughcooperation of the spring I19 thereby rotating the feeding wheel I 82. Ratchet I10 prevents a backward movement of the ratchet wheel I39," shaft I80 and feeding wheel'I82 and permits movement thereof only in one direction. The feeding wheel I32 rotates a predetermined amount upon each rotation-of the cam I8 so that onewheel Z8-moves to. the first station of my machine. The'upward movement of the bell crank I62 also moves the adjustable rod I93 upwardly thereby moving the bell crank I96 and causing reciprocating movement of the rod-200. The hinged pivotable member 204 moves with the rod 200 and engages a wheel 18 in the track 15 and moves them forwardly to the second station of my machine. The hinged member 204 is provided to drop into the track Hi to move a wheel Hi to the second station of my machine when the member 204Yhas no wheel upon which to ride.

Fig. 8a shows the cutters or die members I99 and I91 off-set from each other so as to engage the periphery of a wheel 180 from each other and approximately 15 from a transverse vertical plane passing through the center of awheel. 'It 'hasbeen found that by off-setting the cutters I-- and I 9I', they tend to force the metal on the periphery of a Wheel outwardly somewhat like an undercutting operation thereby producing'a better abrading surface than a coining operation with the cutters moving directly into the wheel at right angles to a tangent thereof.

The cutters strike the wheel simultaneously degrees apart. The gearing of my "machine is so selected as to impart cutting action to the cutters I90 and NH during the period th-atthe Wheels 18' are rotated 180 degrees thereby causing each cutter to abrade one-half of the outer surface of thewheel'18. The surface I36 on the notching cams I35 may be altered to-a-ny suitablenumber of high pointsas long-as opposing 9 cams are the same. Changing of the high points on the cams I35 changes the tooth pattern formed on the wheels 18. By providing shortened cleats 13a as shown in Fig. 101), small chips may readily move upwardly into the axial bore of the gripping member 59 or 10.

It will be evident from the foregoing description that I have provided a novel machine for cutting grooves on the periphery of a wheel at any desired predetermined angle and depth at different stations of a machine which are moved continuously through the machine automatically at a high rate of production.

Various changes may be made in the specific embodiment of my invention without departing from the spirit thereof or from the scope of the appended claims.

What I claim is:

1. A machine for forming an abrading surface on the peripheral surface of a wheel having a central concentric hole therein comprising a rotatable member for engaging one face of a wheel, an intermittent conveying device beneath said rotatable member for conveying wheels into a position in axial alignment with said rotatable member, a lifting member for raising said wheels upwardly from said conveying device into engagement with said rotatable member during a period of rest of said conveying device, said rotatable member engaging a side of the wheel concentric with the periphery thereof, said lifting member comprising a wheel engaging surface and a guiding pin extending from said wheel engaging surface to engage the hole in said wheels, rapidly reciprocating die members sidewise of said conveying device for impressing spaced diagonal grooves on the periphery of a wheel during the period of rotation thereof with said rotatable member, said die members being in opposed relation 50' that the impression on the wheel is in the form of cross hatching, and power means for operating said conveyor and rotating said rotatable member, rapidly reciprocatingly operating said die members and operating said lifting member.

2. The machine recited in claim 1 wherein the die members engage the periphery of said wheel diametrically opposite each other and are disposed at an acute angle to a transverse plane passing through the center of the wheel.

3. The machine recited in claim 1 wherein said die members comprise a plurality of pairsof diametrically opposed dies disposed at spaced points along said conveying device, one pair of said dies being disposed to impress said spaced grooves at an angle to the grooves impressed by another of said sets of dies whereby said grooves are formed in cross hatch relation.

4. The machine recited in claim 1 wherein said rapidly reciprocating die members comprise a plurality of camming surfaces and dwell means operably connecting said camming surfaces with said lifting member whereby said rapidly reciprocating die members are inoperative when said lifting member moves out of engagement with said wheels.

5. The machine recited in claim 1 wherein said intermittent conveying device comprises a feeding wheel rotatable in a plane parallel to the side face of said wheels to be abraded, said feeding wheel being rotatably mounted on said machine, said feeding wheel having a plurality of notches around the periphery thereof for engaging said wheels to be abraded, said feeding wheel being operatively connected to said power means and intermittently operated thereby.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 435,573 Tyler Sept. 2, 1890 530,213 Tyler Dec. 4, 1894 551,066 Tyler Dec. 10, 1895 579,746 Etches Mar. 30, 1897 682,862 Arnold Sept. 12, 1899 1,225,995 Norris May 15, 1917 1,827,994 Gray Jan. 13, 1920 1,619,971 Dean Mar. 8, 1927 2,455,348 Barstow Dec. 7, 1948 

